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4.2 Wiring Diagram
MCCB
3-Phase
R
Power
S
Supply
380~460V
T
50/60Hz
High Speed Fuse
(recommendation)
Run
7
Enable
9
External Fault
(A)
10
Fault Reset
12
11
16 COM: Common for I/O
*) caution 1 : The cable length between DC Link terminal of inverter and terminal of RCU should be less than 7m. P-N of RCU
and DC Link terminal P(+), N(-) of inverter should correspond.
*) caution 2 : Install Fuse between RCU output terminal (R, S, T) and power supply.
(Refer to chapter 4.5 for wire and fuse specification)
*) caution 3 : When you want to connect inverter with RCU, Connect Healthy (A_contact) signal of RCU with Enable signal of
inverter.
*) caution 4 : You should install a AC input reactor to prevent the regenerated power from flowing to inverter.
*) caution 5 : You should link RCU output-side terminals (R, S, T) between main input power and input AC reactor of inverter.
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*) caution 5
MC
*) caution 2
R
S
T
DO1.A
21 (B)
Fault_a
DO1.C
AC 1A/250V
23 (COM)
DC 1A/30V
22 (A)
DI 1:
DO1.B
SOHO RCU
RCU
DI 3:
DO2.A 24 (B)
DI 4:
Healthy
DO2.C
26 (COM)
AC 1A/250V
DC 1A/30V
DI5:
25 (A)
DO2.B
COM: Common for I/O
P
N
FG
Ground
High Speed Fuse
(recommendation)
Figure 4.1 RCU typical wiring diagram
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Hitachi America, Ltd. RCU SERIES
*) caution 4
ACL
*) caution
3
INVERTER #9-1
INVERTER #9-2
1k ~10kΩ 0.5W
shield
Forward Run/Stop
7
Reverse Run/Stop
8
RCU #21
RCU #23
9
Enable
#9-2
#9-1
10
External Fault
DO1.A
11
Fault Reset
12
Multi-Step Speed Setting 1
13
Multi-Step Speed Setting 2
14
Multi-Step Speed Setting 3
15
16
*) caution 1
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L1
L2
L3
INVERTER
Multi-function
SOHO VD INVERTER
(typical)
Analog Output
-10 to +10V 2mA
1
10Vref COM
(Output Current)
17
Iout-
2
+10Vref : 10Vdc
0(4)~20mA
3
Vin1 / lin2+
18
lout+
lin1-
4
Shield
Vin2 / lin2+
5
20
24Vout
Ready Relay
6
lin2-
DC3
19
DI1
DI2
DO1.A
DI3
21
AC 1A/250V
Brake Contact
DO1.C
23
DI4
DC 1A30V
(Open & Close)
COM
22
Multi-function
DO1.B
DI5
Contact Input
DO2.A
24
DI6
DO2.C
Fault Contact
AC 1A/250V
DI7
26
DC 1A30V
DI8
25
DO2.B
COM
P
N
U
V
W
IM
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IC : 50mA
Output
Closed in
healthy
condition
Output
13
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